What happened when the chainsaw didn't catch fire? Why can't you drag a wise man?

Chain saw is an internal combustion engine. Combustion requires three conditions: oxygen, combustible and a certain amount of heat. Meet these three conditions and your machine will start. Oxygen: When the machine cools down, you need to close the air door. That is, the air door push rod is not pulled out. Don't push the machine in before it starts. It is also necessary to check whether there is water in the cylinder. Remove the spark plug and check whether there is a large amount of fuel in the cylinder. If there is too much fuel. Is there air in the cylinder? The machine won't start like this. You can turn the machine upside down at this time. Clean the fuel in the cylinder. Combustible: The combustible of the machine is the fuel in the fuel tank. You need to check whether the fuel supply to the carburetor is normal. Is the oil circuit unobstructed? Certain heat: refers to the ignition system of your machine. You need to take the spark plug out of the cylinder and plug it in the ignition wire. Contact the threaded part of the spark plug with the metal part of the chassis, and then pull the starter. See if the spark plug ignites normally. I hope the above introduction can help you. If not, you can call my QQ to help you troubleshoot.